Hi there,

There is another way, if you have the "snipping tool" which is free for Windows 10. You would press Shift + Windows Key + S & it will bring up a screenshot window for you to take them. I know it can be a frustration at times to take them.

The PrtScn button used the following way might help: Windows key + PrtScn saves as a screen shot.

Another alternative option is: Alt + PrtScn, then open paint, paste it there (ctrl + V) & then save it as a file.

I hope this helps to make it easier, or at least less of a frustration.

Pressing PrtScn by itself or with Fn or Windows key simply brings up the dialog box that says Pressing F7 turns Caret Browsing on or off...

That's strange, PrintScreen is a very different key than the F7 function key (at least, on keyboards I've seen).

You can disable the F7 keyboard shortcut in Firefox to see whether that makes any difference:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.

(2) In the search box in the page, type or paste caret and pause while the list is filtered

(3) Double-click the accessibility.browsewithcaret_shortcut.enabled preference to switch the value from true to false

Now Firefox should ignore the F7 key. Whether that will help with your keyboard cross-over, I don't know. Maybe it's time to do a regular shutdown and restart of Windows to straighten things out?